Identify the most effective method by which a writer can persuade a reader.

A.S/he repeats the same idea over and over, using different words.

B.S/he tries to use information that could frighten a reader.

C.S/he supports main points with strong research.

D.S/he proofreads the final draft to ensure that it contains no errors.

I say D. Please check my work.

There's a far better answer.

Think about what it would take to convince you of someone else's ideas -- a perfectly written and proofed paper or what?

To identify the most effective method by which a writer can persuade a reader, we need to evaluate the options provided:

A. Repeating the same idea over and over, using different words: While repetition can be a useful rhetorical device, it is not necessarily the most effective method of persuasion. Repeating the same idea without providing additional evidence or supporting arguments may not be persuasive to all readers.

B. Trying to use information that could frighten a reader: Appealing to fear can be a persuasive technique in some specific cases, but it is generally not considered the most effective method for persuasion. It can be seen as manipulative and may not always lead to a logical or informed decision.

C. Supporting main points with strong research: This option is a strong contender for being the most effective method. Using credible and well-researched information to support arguments and main points can make the writer's case more convincing and persuasive to readers.

D. Proofreading the final draft to ensure that it contains no errors: While proofreading is an essential step to maintain professionalism and credibility, it is not directly related to persuading the reader. Proofreading helps ensure the clarity and accuracy of the writing, but it does not necessarily contribute to the overall persuasive power.

Based on this evaluation, option C, supporting main points with strong research, is the most effective method by which a writer can persuade a reader. It provides solid evidence and logical reasoning, which can help convince readers of the writer's viewpoint.